Nut lock



Get; 2,9, 19.29. T V, s, DORSEY 1,733,529

NUT LOCK Filed om. 17, 192s 31a/vento@ Patented Oct. `29, 19294 'UNTE STATES PATENT# oFF/ics g THOMAS V. S. DORSEY, OF LOCKEORT, LOUISIANA, yAVSSIGrNOR FIFTY-ONE PER CENT TO LOUIS E." DAVIET NUT Loox y Application area october 17,` 1928. sereine. 313,156.

This invention relates to new and useful improvements in locking devices, and particul arly to devices for locking nuts and bolts.

@ne object of the invention is to provide a nut lock wherein a nut and washer cooperate to prevent the retrograde rotation of the nut and bolt.

Another object is to provide a nut lock which includes means cooperating with the nut to permit the nut to be locked in engagement with a washer', such means being operable to release the washer whereby to permit easy and quick removal of the nut.

Other objects and advantages will be apparent from the following description when taken in connection with the accompanying drawing.

1n the drawing:

Figure 1 is an elevation of a bolt engaged through a piece of work and having the improved locking means thereon.

Figure 2 is an enlarged vertical longitudinal central sectional view through the locking device, and a portion of the bolt.

Figure 3 is a side elevation of the device, showing the means for releasing the washer pawl from the teeth of the nut, whereby to permit the nut being removed.

Referring particularly to the accompanying drawing, 10 represent-s a bolt which is disposed through the work 11, such bolt having a threaded portion 12 formed with a longitudinal groove 12. Engaged on the bolt, and having an internal lug or tongue 13, engaging in said groove, is a washer 111, said washer being split and having one end of the split turned out of the plane of the washer to forni a spring locking tooth or pawl 15. Threaded on the bolt is a sleeve 16, the inner end of which is formed with a peripheral flange 17, such sleeve being eX- ternally threaded, as indicated at 18. The outer end of the sleeve is formed with a plurality of faces 19, with which a wrench may be engaged to turn said sleeve. Threaded on the sleeve 16 is the nut 20, which is formed with a cavity or recess 21, in its inner face, and has a series of ratchet teeth 22, surrounding said recess, such teeth being arranged to engage with the before-mentioned tooth or pawl 15, of the washer 14,' for the l purpose of preventing'retrograde rotation of the nut, when once screwed up tightlyagainst the washer.

s lt will be noted that the diameter of the flange 17, of the sleeve 16 is suchk that it readily fits within the recess of thenut.

In the operation ofthe device, the bolt is i first passed through the work, and thenthe washer slipped on the bolt until it rests against the face of the work. The. sleeve 16 is then screwed on the bolt, and the nut 20 screwed on the sleeve. until its teeth engage with the pawl of the washer, it being noted that the sleeve is rst screwed up until the flanged end thereof is in close proximity to the washer, but not contacting therewith, so that when the nut is further turned up, for the eflicient locking thereof with the washer, the said flanged end of the sleeve will lie within the recess of the nut. The proper engagement of the nut with the pawl of the. washer uncovers the wrench engaging faces of the sleeve, as will be readily seen upon inspection ofthe drawing.

When it is desired to remove the nut, a wrench isengaged with the said faces of the sleeve and said sleeve turned inwardly untily the flanged end thereof flexes the pawl, or end of the washer into the plane thereof, or to such a degree as to free said pawl from the teeth of the nut, when the operator mayy easily and quickly unscrew the nut. The nuty and sleeve may then be easily unsorewedfrom the bolt, kto permit removal of the bolt from the Work;

What is claimed is: 1. In a nut locking device, thecombination with a bolt having a longitudinally-grooved threaded portion kand a split spring washerk on the bolt having a tongue engaged kin said groove, of a sleeveengaged on the bolt having a flange on its inner end, and a nut threaded on the sleeve having a'recess receiving said flange wherebysaid flange is out of engage- The nut is turned up ment with the washer, said nut being pro- 1 vided with teeth engaging an end ofthe washer. f o

2. Lln a nut locking device, the combination n with a bolt having a threaded portion formed with a longitudinal groove, and a split spring washer on the bolt having a tongue engaged Vin said groove, of an internally and eX- ternally threaded sleeve engaged on the bolt having'wreneh faces on its outer end and a lia-nge on its inner end, and a nut engaged on the sleeve enclosing said flange and having teeth for engagement with the washer, said sleeve being adapted to be turned inward-lywhereby to cause the flange thereof to enga-ge-v and flex the washer out of engagement with the teeth of the nut.

3. In a nut locking device, the combination with a bolt carried spring washer, of a sleeve engaged on the bolt and having internal and external threads, the inner end of the sleeve having a peripheral flange, the outer end of the sleeve having wrench faces, and a nut engaged on the sleeve having teeth for engagement with the washer and having a recess receiving said lange when the parts are 1n operative position, said sleeve being adaptved to be screwed inwardly to leX the washerY out of engagement with the nut, whereby to permit the nut to be unscrewed.

In testimony whereof, I ailix my signature.

THOMAS V'. S. DORSEY. 

